Micrel, Inc.

MICRF220

August 2010

4

M9999-082610-A

Electrical Characteristics (Continued)

Parameter

Condition

Min.

Typ.

Max.

Units

Demodulator

165

CTH Source Impedance,

Note 6

120

kΩ

CTH Leakage Current In

CTH Hold Mode

1

10

nA

Digital / Control Functions

DO Pin Output Current

300

680

µA

Output Rise Time

600

Output Fall Time

15pF load on DO pin, transition time

200

ns

Input High Voltage

SHDN, SEL0, SEL1, SQ

V

Input Low Voltage

SHDN, SEL0, SEL1, SQ

V

Output Voltage High

DO

V

Output Voltage Low

DO

V

RSSI

−110dBm RF input level

0.5

RSSI DC Output Voltage

Range

−50dBm RF input level

2.0

V

RSSI Output Current

5k

Ω load to GND, −50dBm RF input level

400

µA

RSSI Output Impedance

250

Ω

RSSI Response Time

from no input to

−50dBm

10

ms

Notes:

1.

Exceeding the absolute maximum rating may damage the device.

2.

The device is not guaranteed to function outside of its operating rating.

3.

Device is ESD sensitive. Use appropriate ESD precautions. Exceeding the absolute maximum rating may damage the device.

4.

Encoded bit rate is 1/(shortest pulse duration) that appears at MICRF220 DO pin.

5.

In an ON/OFF keyed (OOK) signal, the signal level goes between a “mark” level (when the RF signal is ON) and a “space” level (when the RF

signal is OFF). Sensitivity is defined as the input signal level when “ON” necessary to achieve a specified BER (bit error rate). BER measured with

the built-in BERT function in Agilent E4432B using the PN9 sequence. Sensitivity measurement values are obtained using an input matching

network corresponding to 315MHz or 433.92MHz.

6.

CTH source impedance is inversely proportional to the reference frequency. In production testing, the typical source impedance value is verified

with 12MHz reference frequency.